Electric-lamp socket.



M. SCHWARTZ,

lELECTRIC LAMP SOCKET.

APPLICATION FILED JAN.31,1912.

` Patented Nov. 18, 1913.

i. SHEBTS-BHBET 1.

Lom.

UNl I TED STATES; PATENT OFFICE.

MORRIS SCHWARTZ, F CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF T0 J'. HENRY KRAUSE, OF CHICAGO, ILLINOIS.

ELECTRIC-LAMP SOCKET.

Specification oi' Letters Patent.

Application led January 31, 1913. Serial No. 874,486.

Patented Nov. 18, 1913.

. To all whom t may concern:

Be it known that I, Momus Sor1wARTz, a citizen of the United States, residing at Chicago, in' the Ycounty of Cook and State of` Slllin'ois, have invented a new and useful Improvement in Electric-Lamp Sockets, of which' the following is` afspeeification My invention relates to improvements in electric-lamp-seckets of the variety in which flo provision is made for preventing the remi Referring tothe accompanying drawings,

f wherein certain of the embodiments of my invention are illustrated Figure 1 is a longtudinalv sectional view'of a lamp-socket constructedfin accordance with my invention, showin the lam -receiving shell in eleva-tion an a lamp, s own in broken sectional elevation, screwed into the socket. Fig. 2 is a section taken at the line 2 on Fig.

1 and viewed in the direction of the arrow.

-w'Fgc is an enlarged section taken at the line l'on Fig. y2 and viewed in the direction ofthe arrow. Fig. 4 is a plan view of the lower one of the two sectional insulating members located in the socket and the parts carried thereby. Figs. 5, 6 and 7 are sections taken at the lines 5, 6 and 7 on Fig. 4 and viewed in the directions of the arrows. Fig. 8 is a section taken at the line 8 on Fig. 2 and viewed in the direction of the arrow. Fig. 9 is a section taken at the line 9 on Fig. '1 and viewedin the direction of the arrow. 'f' Fig. 10 is a section taken at the line 10 on Fig. 1 and viewed in the direction of the arrow. Fig. 11 is a view similar to that of Fig. 8' of another embodiment of my invention.' Fig.412 is a plan view of the lower one of the two sections of insulatin material to whichl the oprative arts o the socket forming anot r em iment of my invention are secured; this view also showing in plan the gp'eratin parts carried by said lower member. 1g. 1'3 is a bottom plan view of spring-devices forming' parts of the locking mechanism of the construction. Fig.

llgis a view, like that of Fig. 12 with the spring-devices of Fig. 13 removed. Fig. 15 is an enlarged sectional view taken at the line 15 on Fig. 12 and viewed in the direction of the arrow. Fig. 16 is a section taken at the line 16 on Fig. 12 and viewed in the direction of the arrow. Fig. 17 is 'a view similar to Fig. 12 of still another modification of my invention. Fig. 18 is a view in elevation, partly sectional, of the construction illustratedV in Fig. 17 with the upper section of the insulating yblock in place; and Fig. 19, an enlarged section taken at the line 19 on Fig. v18 and yiewed in the direction of the arrow.

The type of socket in conne tion with which I have chosen to illustrate m invention is that in which a screw-thi' a ed shell 4 is'provided into which an incandescent lamp of ordinary externallythreaded type is adapted to be screwed, though it will be understood that my invention may be embodied in sockets of other types.

Referrind particularly to the construction illustrated 1n Figs. 1 to 1Q` inclusive, the casing of the socket, whclrisillustrated at 20, is formed of a main=section 21 and the usual capJsection 22, the section 21 beinb lined with insulating material 23. Located in the casing 21 is a block 24 of insulating ma terial, such as porcelain, formed of upper and lower abutting sections 25 and 26, re spectively, connected together as through the medium of screws 27. The lower end of the section 26 is peripherally' recessed as indicated at 28, and in connection with a ring 29 of current-conductin material secured to a shouldered face 30 o the section 26 as by screws 31 affords a channel into which the inwardly-turned flange 32 of an outwardlyopening shell 33, internally screw-threaded as represented at 34, extends. By this feature of the construction, the shell 33 is rotatable upon the block 24, and is held against displacement thereon by means of the ring 29. The binding-posts for connection with the Wires for conducting the cur-4 rent to the socket are represented at 35 and 36 and are located in recesses 37 and 38 in the opposed faces of the sections 25 and 26, the binding-post 35 being formed of a screw 39 which screws into one arm' of a bracket 40, this bracket being secured in position and held in close electrical contact at' its other arm with a spring-fin er' 41 by means of' e screw 42 passing throng the upper s ec- 110H bears. Journaled in opposed openings 5l in nals of the lamp 50 with the binding-posts the latter from being unscrewed from the tion 25v of the block 24. The other bindingpost is formed of a screw l43 screwing into a metal clip 44 secured at its upper end to a screw 45 in the block-section 25 and at its lower end is connected with one of the screws 31 whereby the binding-post 36 is electrically connected with the ring 29, and when the lamp is screwed into the shell 33 is electrically connected with said shell. The recess 38 in the block-section 26 contains a yoke-shaped member 46 which is rigidly held in upwardly-extending position, as represented in Fig. 3, by a screw 47 passing through a metal plate 48 held against the under side of the block-section 26, the screw 47 serving as one of the contacts for the socket and against which one ot' the terminals 49 of the lamp, illustrated at 50 the member 46 is a metal shaft 52 carrying a contact-making-and-breaking head 53 rigid thereon. Slidable upon the yoke 46 is a plate 54, between which and the base of the recess 38 a coiled spring 55 is confined, it being understood that the head 53, by the arrangement described, is electrically connected with thecontact 47. The shaft 52 is so positioned relative to the spring-arm 41 that when this shaft is `turned as through the medium of the linger-grip 56 thereon, the head 53 will be moved into engagement with the spring-arm 41, thereby electrically connecting the termi- 35 and 36, the spring-pressed plate 54 serving to insure proper electrical contact of the shaft 52 with the walls of the openings 51.

`In carrying out my invention, I provide means for releasably locking thel shell 33 against movement upon the block 24 :tor the purpose of' permitting the lamp 50 to be screwed into, or unscrewed out of, the shell l33, by an authorized person, as desired, it being understood that it is intended that the shell 33 be free to rotate on the block 24"' when the lamp is in use, thereby preventing socket, the description of the means above referred to being as follows: Journaled on the shaft 52 in recesses 57 and 58 in the block-sections 25 and 26, respectively, are disks 59 and 60, containing grooves 61 and 62, respectively, in the faces thereof. The disks 59 and 60 contain in their peripheries notches 63 and 64 and are equipped with pins 65 and 66 in their grooves 61 and 62, respectively, the pin 66 also projecting beyond the opposite face of the disk opposite to that containing the groove 62.l Slidable in openings 25EL and 67 in the block-section 25 are. pins 68 and 69 connected together at their upper ends by a cross-bar 70 against which the free lend of a leaf-spring 71, se-v cured tothe top of the block-section 25 as by one of the screws 72 bears. The pin 68,

which is in effect dog, is beveled at its Lorena@ under the action of the spring 71; yThe lower' end of the pin 69 is of reduced. diameter, as represented at 74, at which it 1s` slidable in an opening 75 in the block-section 26, this pin, extending at its lower end, into the groove 28 when the dog 68 extends into the recesses 63 and 64 of the disks 59 and 60, the shell 33 having its body-portion and flange 32 cut away as indicated at 76 to form shoulders 77 and 78 into the path of -movement of which, when the shell 33`is partially rotated Jin either direction, the pin 74 extends, whereby the shell 33 is heldy against rotation on the vblock 24, thus permitting a lamp to -f be screwed into or unscrewed 'out of said shell.

' ,The shaft 52 adj acentto the disk 60 carries aratchetwheel 79-journaled thereon and -rigid with a thumb-piece 7 9a of msulating .material likewise journaled on the shaft, the

ratchet 79 being provided about a .portion only of its periphery with teeth 80,- the untoothed. portion of its periphery being represented at 81. The ratchet 79, which engages fat its teeth with a spring-pressed dog 82 'located in a recess 83 in the block-section 25, is provided on its face adjacent to the disk 60 with a pin 84 so positioned as to extend y into the groovey 62.

The movement of the disks 59 and 60 toZ -a position in which their recesses 63 and 64 are brought into alinement with each other and into registration with the dog 68, is

.effected through the medium of the handvpiece 79a and the pins'65, 66 and 84, these 1 parts of the construction forming a permutation lock, it 'being understood that when the thumb-piece 7 9a is turned to the left, the

`engagemrgitnoijthe pin 66 with the pin 65 andthe engagement of the pin 84 with the Vpin 66 will cause the disks `59 and 60 and ratchet 79 t`o"turn\ in the same direction on the shaft 52 and "that when the disk 60 is rotated through the medium of the thumbpiece 79a by engagement of the pins 66 and 84 with each other, in a direction to move the pin 66 in a direction in which said last referred to pin does not engage with the pin 65, the disk 59 will remain in the position to which it Wasrotated by the pin 66 While engaging with the pin 65. It will thus be understood that by varying the positions of any one ofthe pins 65, 66v or 84, the number of turns which must be given to the hand-piece 792L to the righty and to `theleft, to cause the recesses 63 and 64 to aline with each other and register `with thedog 68, may be varied as desired. inthe, construction illustrated, the combination for mov-V mg the disks 59 and 60 to a position in 8l to engage with the pin 66 andthe pin 66y to engage with the pin 65 and to bring the ratchet "7 9 to a position in which its smooth portion 81 opposes the dog 82. The operator thencontinues turning the thumb-piece 79 to the left and into engagement at its teeth 80. with the dog 82,'until the latter.

has, by its movement over the teeth 80, made.

five clicks. By thus operating the thumbpiece 79, the disk 59 will be moved to-` a position in which its recess4 63 opposes the dog` 68. The, operator then rotates the thumb-piece 79a t0 the right suiliciently far to cause the smooth portion 81 of the ratchet 79 to pass across the face of the dog 82 and thereupon continues to turn the thumb-piece 79L to the right untilthe dog 82in passing over the teeth clicks four times, it being understood that in the movement of the finger-piece 7 9a to the right as stated, the disk 59 remains stationary.- Thus operating the thumb-piece 7 9 moves the disk 60 to a position in which its recess 64 alines with the recess 63 and both of these recesses oppose the dog 68, (Figs. 3 and 4), the dog 68 springing into these recesses and causes the pin 75 to project into the path of the shoulders 77 and '78 for locking the shell 33 against rotation for the purpose hereinbefore stated, it being understood that the disk 59 is moved to the position stated by the engagement of its pin'65 with the pin 66 when the ratchet 79 is turned to the left and that the disk 60 is moved into said position by the engagement of the rpin 84 with the pin 66 in the movement of the thumbpiece 79a to the right.

When it is desired that the pin 7 5 be withdrawn from the path of movement of the shoulders 77 and 78 of the shell 33, as .for example after the lamp 50 has been screwed into place, to prevent its removal from the shell 33, the operator rotates the thumbpiece 79a to the right or left sufficiently far to move at least one of the disks 59 or 60 into a position in Which its recess is out of registration With theclog 68, which operation forces the latter and the pin 67 upwardly against the action of the spring 71 to a po.- sition in which the pin 75 is Withdrawn from the groove 28.

In Fig. 11 is illustrated a modification of the spring-means tending to force the shellengaging pin 75 and the dog 68 into the -path of movement of the shoulders 77 and 78 and into the recesses 63 and 64, respectively. In this construction instead of employing a leaf-spring 71, I provide a coiled spring which surrounds the pin 69 and is confined insa recess 86 in the block-section 25 between the upper Wall of said recessA and theupper end of a sleeve 87 of insulating material fixed on the reduced portion 75 of the pin 69, the spring 85 tending to 7 force the dog 68 and pin 69 downwardly, for the purposedescribed of the precedlrlgr construction. A The construction illustrated in Figs. 12 to 16 inclusive isthe same as that illustrated in W5; Figs. 1.to410 inclusive, excepting as to the spring-controlled devices which coperate, with the disks 59 and 60 andthe ratchet 79. In the construction illustrated in Figs..A 12 to 16, the leaf-spring 88, locatedina recess so; i 89 `in the block-section 25, is secured;therein by a screw 90 and is split longitudinally asrepresented at 91- to afford'spring-arms 92 andy 9,3. The spring-arm 93 carries a depending tooth 94 ada ted to engage with nthe 35` teeth 80 on the ratc et 79, as describedof: the do 82, and the spring-arm 92 carriesa depen ing tooth 95 coperatin with the rev cesses 63 and 64 as describe of the construction illustrated in Figs. 1 to 10-incluwV ,of sive. The pin forprojection into the groove 28 oni the block 25 for, engaging vvitlrthe4 shoulders 77 and 78 on the shell 33 tore leasably lock the latter against rotation, is.: represented at 96, this pin which islsecured 95. to the spring-arm 92 being slidable in an. opening 97 in the block-section 26 and operfv ating as described of the previous construe@` tions to be projected into the groove 28-to., engage with the shoulders 77 and 78 of the; 190 shell 33, when the tooth 95, under the action, 1 of the spring-arm 92 on which itiis carried is projected downwardly into the recesses 68.-, v and 64 on the disks 59 and 60.

The construction illustrated in Figs 18 and 19 is the same as the construction' illustrated in Figs. 12 to 16 inclusive, ex-.

cept that the pawl for engagingwith the# if ratchet 79 instead of being a spring-arm is i. a dog, such as that represented 9.13.98 slidA-p., 110,` able in an openin '99 in the block-section 26 and backed up y a spring 100, and instead of securing the spring-arm, which carries the tooth4 for engaging with the recessed y disks 59 and 60, to the block-section 25, the 115 spring-arm of this construction represented at 101 and carrying a depending tooth 102 for engagement with the recesses in said disks, 1s reversely bent to aii'ord a section 103 at which the spring 101 is secured to the 120 block-section 26 by means of a bolt 104 passing through said block-section, the section 103 of said spring and a spacer-block 105 confined between the latter and said blocksect-ion.

While I have illustrated and described certain forms of construction in which m invention may be embodied, I do not Wis to be understood' as intending to limit it to such .forms as the same may be variously 130 modied and altered Without departing" i from the spirit of my invention.

Afr,

What I claim as new, and desire to secure by Letters Patent-,is

1." In an electric-lamp socket, the combination of its casing, a threaded lamp-engaging member rotatably mounted in said casing, a spring-pressed reciprocable-pin cooperating With said threaded member for locking it against rotation, and rotatable tumbler permutation locking means for moving said pin out of engagement with said threaded member, for the purpose set forth.

2. AIn an electric-lamp socket, the combination of its casing, a threaded lamp-engag ing member rotatably mounted in said casing, a movable member movable into and out of locking engagement with said lampengaging member for releasably locking the latter Vagainst rotation, 'a reciprocable member operating to control the position of said movable member, and means for controlling the position of said movable and reciprocable members comprising a plurality of relatively 'rotatable members provided with means coperating with said reciprocable member for controlling the position of the latter.

3. In an electric-lamp socket, the combination of its casing, a threaded lamp-engaging member rotatably mounted in said casing, a dog, a pin operatively engaging `With said dog and movable linto and out of locking engagement With said threaded member, spring-means tending to move sai`d pin to locking position, means for control- 'ling the position of said dog and pin comprising a pair of relatively rotatable members coperating with said dog for cont-rolling the position of the latter, and means for rotating one of said last-namedmembers from the other thereof.

said switch device and atrapa 4. In an electric-lamp socket, the' combination of its casing, a lampi-engaging niember rotatably mounted in said casing, a rotatable switch-device in said casing, and permutation locking means' on said switch-Y evice for releasably locking said member against rotation.

5. an electric-lamp socket, the ,combination of its casing, a"lamp-engaging` member rotatably mounted in said casing, a rotatable switch-device in said casing, and permutation locking means. journaled on rovided thereon with an actuating member, or releasably locking said lamp-engaging member against rotation.

6. In an electric-lamp socket, the combination of its casing containing an insulatin base equipped with electric contacts, a sha t journaled in said base and carrying a switch-device fory engagement With vsaidontacts, a lamp-engaging member rotatably mounted on Tsaidbase, and permutation locking means on said shaft for releasably locking said member against rotation.

7. In an electric lamp-socket, the combination of its casing, a threaded lampengaging member rotatably mounted in said casing, a yoke-shaped member reciprocably confined in said casing, said member bei-ng movable at one end into and out of locking engagement With said threaded member, a leaf-spring on the socket operating against said last-named member, and means coperating with the other end of' said yoke member for controlling the position oft-he lloatter relative to said lamp-engaging mem- Monnrs SCHWARTZ.

In presence of- L. IIEISLAR, R. SGHAEFER.

Copies of this uatent may be obtained for ve cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

